Smallest radial engine double star in the world.

Radial engine double star with 10 cylinders and 10 longitudinal camshafts drafts to 36º.It´s made with artisanal methods.It has variable pitch propeller,works with compressed air and with only 0,2 kg/cm2.The diameter of the cylinders is 18 mm and the stroke of the pistons is 16 mm.The displacement is 40,7 cm3.Probably it´s the smallest double star engine of the world.It´s built by José Manuel Hermo Barreiro "Patelo" .Pieces=398,Screws=289,Hours of work=1810.